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The German authorities say they can't be certain that a man arrested on Monday was the driver of the truck that smashed into a Christmas market in Berlin. Twelve people died when the vehicle ploughed into the crowded square. The German interior minister, Thomas de Maiziere, said the suspect was an asylum seeker who was probably from Pakistan, but the man denied his involvement. Federal prosecutor Peter Frank, said the style of attack and the target suggested Islamic extremism.

Also in the programme, Russian investigators arrive in Turkey after ambassador assassinated in Ankara and a new treatment for prostate cancer.

(Photo: Scene around a truck that crashed into a Christmas market in Berlin. Credit: ODD ANDERSEN/AFP/Getty Images)